/* | |
* Copyright (C) 2008, 2009 Apple Inc. All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions | |
* are met: | |
* | |
* 1. Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright | |
* notice, this list of conditions and the following disclaimer in the | |
* documentation and/or other materials provided with the distribution. | |
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of | |
* its contributors may be used to endorse or promote products derived | |
* from this software without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
*/ | |
#include "config.h" | |
#include "JSActivation.h" | |
#include "Arguments.h" | |
#include "Interpreter.h" | |
#include "JSFunction.h" | |
namespace JSC { | |
ASSERT_CLASS_FITS_IN_CELL(JSActivation); | |
const ClassInfo JSActivation::info = { "JSActivation", 0, 0, 0 }; | |
JSActivation::JSActivation(CallFrame* callFrame, NonNullPassRefPtr<FunctionExecutable> functionExecutable) | |
: Base(callFrame->globalData().activationStructure, new JSActivationData(functionExecutable, callFrame->registers())) | |
{ | |
} | |
JSActivation::~JSActivation() | |
{ | |
delete d(); | |
} | |
void JSActivation::markChildren(MarkStack& markStack) | |
{ | |
Base::markChildren(markStack); | |
Register* registerArray = d()->registerArray.get(); | |
if (!registerArray) | |
return; | |
size_t numParametersMinusThis = d()->functionExecutable->parameterCount(); | |
size_t count = numParametersMinusThis; | |
markStack.appendValues(registerArray, count); | |
size_t numVars = d()->functionExecutable->variableCount(); | |
// Skip the call frame, which sits between the parameters and vars. | |
markStack.appendValues(registerArray + count + RegisterFile::CallFrameHeaderSize, numVars, MayContainNullValues); | |
} | |
bool JSActivation::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot) | |
{ | |
if (symbolTableGet(propertyName, slot)) | |
return true; | |
if (JSValue* location = getDirectLocation(propertyName)) { | |
slot.setValueSlot(location); | |
return true; | |
} | |
// Only return the built-in arguments object if it wasn't overridden above. | |
if (propertyName == exec->propertyNames().arguments) { | |
slot.setCustom(this, getArgumentsGetter()); | |
return true; | |
} | |
// We don't call through to JSObject because there's no way to give an | |
// activation object getter properties or a prototype. | |
ASSERT(!hasGetterSetterProperties()); | |
ASSERT(prototype().isNull()); | |
return false; | |
} | |
void JSActivation::put(ExecState*, const Identifier& propertyName, JSValue value, PutPropertySlot& slot) | |
{ | |
ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this)); | |
if (symbolTablePut(propertyName, value)) | |
return; | |
// We don't call through to JSObject because __proto__ and getter/setter | |
// properties are non-standard extensions that other implementations do not | |
// expose in the activation object. | |
ASSERT(!hasGetterSetterProperties()); | |
putDirect(propertyName, value, 0, true, slot); | |
} | |
// FIXME: Make this function honor ReadOnly (const) and DontEnum | |
void JSActivation::putWithAttributes(ExecState* exec, const Identifier& propertyName, JSValue value, unsigned attributes) | |
{ | |
ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this)); | |
if (symbolTablePutWithAttributes(propertyName, value, attributes)) | |
return; | |
// We don't call through to JSObject because __proto__ and getter/setter | |
// properties are non-standard extensions that other implementations do not | |
// expose in the activation object. | |
ASSERT(!hasGetterSetterProperties()); | |
PutPropertySlot slot; | |
JSObject::putWithAttributes(exec, propertyName, value, attributes, true, slot); | |
} | |
bool JSActivation::deleteProperty(ExecState* exec, const Identifier& propertyName) | |
{ | |
if (propertyName == exec->propertyNames().arguments) | |
return false; | |
return Base::deleteProperty(exec, propertyName); | |
} | |
JSObject* JSActivation::toThisObject(ExecState* exec) const | |
{ | |
return exec->globalThisValue(); | |
} | |
bool JSActivation::isDynamicScope() const | |
{ | |
return d()->functionExecutable->usesEval(); | |
} | |
JSValue JSActivation::argumentsGetter(ExecState* exec, const Identifier&, const PropertySlot& slot) | |
{ | |
JSActivation* activation = asActivation(slot.slotBase()); | |
if (activation->d()->functionExecutable->usesArguments()) { | |
PropertySlot slot; | |
activation->symbolTableGet(exec->propertyNames().arguments, slot); | |
return slot.getValue(exec, exec->propertyNames().arguments); | |
} | |
CallFrame* callFrame = CallFrame::create(activation->d()->registers); | |
Arguments* arguments = callFrame->optionalCalleeArguments(); | |
if (!arguments) { | |
arguments = new (callFrame) Arguments(callFrame); | |
arguments->copyRegisters(); | |
callFrame->setCalleeArguments(arguments); | |
} | |
ASSERT(arguments->inherits(&Arguments::info)); | |
return arguments; | |
} | |
// These two functions serve the purpose of isolating the common case from a | |
// PIC branch. | |
PropertySlot::GetValueFunc JSActivation::getArgumentsGetter() | |
{ | |
return argumentsGetter; | |
} | |
} // namespace JSC |